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Formula:
K2(Fe2+,Mg)2(Mg,Fe3+)4Fe3+2Al(SO4)12.18H2O
Hydrated sulphate, voltaite group
Crystal System: Tetragonal
Specific gravity: 2.59 measured, 2.56 calculated
Streak: Greyish green
Colour: Dark olive green to black
Luminescence: Not fluorescent under UV
Environments
Localities
At the type locality, the Zagh Mine, Hajjiabad, Hajjiabad County, Hormozgan Province, Iran, pertlikite
occurs in a pyrite-bearing
trachytic eruptive rock,
and probably formed after the decomposition of pyrite. Pertlikite
forms single crystals up 1 cm; the phase is associated with
metavoltine, botryogen,
pyrite and alunite
(CM 46.661-669).
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